Cov ntsiab cai ua raws thaum xaiv ib lub Multimeter
(1) Xaiv cov lej tso saib thiab daws teeb meem ntawm multimeter raws li qhov tseeb siv ib puag ncig thiab ntau yam
Cov zaub me ntsis suav thiab kev daws teeb meem yog qhov tseem ceeb ntawm kev ua haujlwm uas yuav tsum tau txiav txim siab thaum yuav ib lub multimeter, thiab lawv kuj yog cov cim tseem ceeb. Feem ntau hais lus, qhov ntau dua cov lej tso tawm ntawm ib lub multimeter, qhov tseeb dua. Rau cov xwm txheej uas xav tau kev ntsuas siab, yuav tsum xaiv lub multimeter nrog cov zaub siab suav thiab daws teeb meem, thiab tus nqi ntawm cov khoom siv multimeter no kuj siab; Yog tias nws tsuas yog siv rau kev ntsuas dav dav, xws li kho cov khoom siv hluav taws xob xws li TV thiab induction cookers, txoj haujlwm ib txwm yog 3 1/2.
(2) Xaiv qhov amplitude tus nqi thiab zaus teb ua haujlwm ntawm AC teeb liab raws li qhov xav tau ntawm qhov kev ntsuas qhov project
Feem ntau hais lus, txoj kev tshuaj xyuas rau kev tiv thaiv, DC voltage, DC tam sim no, thiab lwm yam khoom feem ntau yog tib yam rau ntau yam multimeters. Txawm li cas los xij, rau AC teeb liab ntsuas, muaj ntau qhov teeb meem nyuaj nrog AC teeb liab. Nrog rau kev hloov ntawm AC teeb liab zaus, muaj cov khoom xws li cov lus teb zaus thiab amplitude conversion txoj kev.
Feem ntau, AC teeb liab ntsuas txoj kev tuaj yeem muab faib ua tus nqi ntsuas qhov ntsuas qhov ntsuas thiab qhov tseeb RMS multimeter ntsuas raws li multimeters.
① Qhov ntsuas nruab nrab ntawm cov ntsuas ntsuas feem ntau yog siv rau cov ntshiab sine tsis, thiab nws siv txoj kev kwv yees qhov nruab nrab los ntsuas AC cov cim. Yuav muaj qhov yuam kev tseem ceeb hauv cov teeb liab uas tsis yog sinusoidal, thiab yog tias muaj teeb meem cuam tshuam hauv cov teeb liab sinusoidal, qhov ntsuas qhov yuam kev kuj tseem yuav hloov pauv ntau.
② Qhov tseeb RMS multimeter ntsuas siv cov nqi siab tshaj plaws ntawm lub waveform sib npaug los ntawm 0.707 los xam cov tam sim no thiab qhov hluav taws xob, kom ntseeg tau qhov kev nyeem ntawv tseeb hauv cov tshuab tsis sib haum thiab suab nrov.
Raws li qhov sib txawv saum toj no, cov neeg siv yuav tsum xaiv txoj kev ntsuas sib txawv thiab AC zaus teb multimeters raws li hom thiab xav tau qhov tseeb ntawm qhov ntsuas qhov tseeb.
(3) Xaiv cov haujlwm thiab ntsuas ntau yam ntawm multimeter raws li xav tau
Raws li hom multimeters uas tau hais los saum no, ntau hom thiab qib ntawm multimeters muaj qhov sib txawv thiab ntsuas ntau yam. Rau cov neeg siv zoo tib yam, yog tias nws tsuas yog ntsuas qhov ntsuas tam sim no, qhov hluav taws xob, qhov tsis kam, thiab tawm-tawm, ib txwm siv multimeter tuaj yeem siv tau; Rau thaj tsam ntawm kev ntsuas hluav taws xob, feem ntau yuav tsum ntsuas lub corona ntawm diodes, transistors, thiab lwm yam, yog li nws yog ib qho tsim nyog yuav tau xaiv ib lub multimeter nrog ntsuas kev ua haujlwm xws li diodes, transistors, zaus, kub, thiab lwm yam.
